IDL has had keyword inheritance for a long time. The special keywords _EXTRA, _REF_EXTRA, and _STRICT_EXTRA are used to have a wrapper routine pass its keywords to some routine that it calls. It would be convenient to have corresponding inherited positional parameters, perhaps using the analogous specially named parameter _extra:

pro mg_print, _extra, _extra=e
  compile_opt strictarr

  print, _extra, _extra=e
end

This routine would accept any number of positional parameters/keywords and pass those that PRINT accepts along to it.